Resilience analysis and design of event-triggered offshore steel jacket structures

Abstract

This paper addresses the analysis and synthesis issues of event-triggered offshore steel jacket structures with an active tuned mass damper mechanism. First, to save communication resources, an event-triggered data packet processor (DPP) is proposed such that the transmissions of the sensor data can be regulated over the communication channel. Second, by virtue of the time-delay system approach, a unified closed-loop system model is presented which can well accommodate the simultaneous presence of network-induced delays, nonlinearity and uncertainty in the offshore structure. To further increase resilience, the control law is allowed to possess gain perturbations. Then, via the Lyapunov functional method, criteria for designing a resilient event-based synthesis strategy are derived. Finally, an illustrative example is given to verify that the developed resilient strategy can guarantee the prescribed performance of the offshore structure while alleviating the frequent occupancy of the scarce communication resources.